Dr. Xavier Sala-i-Martin is chief advisor to the WEF's Global Competitiveness Report, a measure of the productivity of global economies across hundreds of indicators. Sala-i-Martin shares the underpinnings of the report, as well as his view on the future of competitiveness in China and the United States. Sala-i-Martin sat down with Asset TV's Gillian Kemmerer and the World Economic Forum Annual Meeting in Davos.